firewall
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C1 noun /ˈfaɪər.wɔːl/

firewall

cortafuegos
Meaning
A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Example
A firewall protects networks from cyber-attacks.
Un cortafuegos protege las redes de ciberataques.
A2 noun /ˈfæʃ.ən/

fashion

moda
Meaning
a popular or accepted style of clothing, behavior, or way of doing something
Example
She always keeps up with the latest fashion.
Ella siempre sigue la última moda.
C2 adjective /ˈfjuːzəbl/

fusible

fundible
Meaning
Capable of being melted or fused.
Example
The engineer used a fusible alloy in the experiment.
El ingeniero usó una aleación fundible en el experimento.
C1 adjective /ˈfɛrəl/

feral

salvaje
Meaning
existing in a wild or untamed state; not domesticated
Example
The feral cat roamed the streets at night.
El gato salvaje rondaba por las calles por la noche.
C1 verb /fɔːˈbɛər/

forbear

abstenerse
Meaning
To refrain from doing something; to show patience or self-control.
Example
She forbore from commenting on his mistake.
Ella se abstuvo de comentar sobre su error.
B1 adverb /ˈfʊli/

fully

completamente
Meaning
completely or entirely; to the fullest extent
Example
She is fully aware of the risks.
Ella está completamente consciente de los riesgos.
C1 verb /ˈfɪdʒɪt/

fidget

moverse inquieto, estar inquieto
Meaning
to make small movements, especially because of nervousness or impatience
Example
The child began to fidget during the long lecture.
El niño empezó a moverse durante la larga conferencia.
C2 noun /ˈfɒpəri/

foppery

excesivo esnobismo
Meaning
Foolish or excessive concern with one's appearance or manners; pretentious behavior.
Example
His obsession with fashion was dismissed as mere foppery.
Su obsesión por la moda fue descartada como simple esnobismo.
A2 adverb /ˈfaɪ.nəl.i/

Finally

finalmente
Meaning
at last; after a long time; in the end; as the last point
Example
After years of hard work, she finally achieved her goal.
Después de años de arduo trabajo, ella finalmente alcanzó su meta.
C2 noun, verb /ˈfɪlɪˌbʌstər/

filibuster

una táctica de retrasar la acción legislativa mediante discursos prolongados; usar tal táctica
Meaning
a tactic of delaying legislative action by prolonged speech; to use such a tactic
Example
The senator filibustered for hours to prevent the bill from passing.
El senador filibusteó durante horas para evitar que se aprobara el proyecto de ley.
C2 verb /ˈfrʌktɪˌfaɪ/

fructify

fructificar
Meaning
To make fruitful or productive; to bear fruit.
Example
The new policies will help fructify the economic potential of the region.
Las nuevas políticas ayudarán a fructificar el potencial económico de la región.
C1 noun fluˈɪd.ɪ.ti

fluidity

fluididez
Meaning
The ability of a substance to flow easily; smooth and graceful movement or style.
Example
The fluidity of the dancer's movements was mesmerizing.
La fluididez de los movimientos de la bailarina era hipnotizante.
C1 noun /fiːt/

feat

hazaña
Meaning
an achievement that requires great courage, skill, or strength
Example
Climbing Mount Everest was a remarkable feat.
Escalar el monte Everest fue una hazaña notable.
C1 adjective /ˈfleɪɡrənt/

flagrant

escandaloso y claramente erróneo
Meaning
shockingly noticeable or evident; glaringly wrong
Example
It was a flagrant violation of the rules.
Fue una clara violación de las reglas.
C2 noun /ˈfoʊ.li.oʊ/

folio

gran libro o manuscrito
Meaning
A sheet of paper folded once to form two leaves (four pages) of a book; also a term for a large book or manuscript.
Example
The library houses an ancient Shakespeare folio.
La biblioteca alberga un antiguo folio de Shakespeare.
C1 adjective /fəˈroʊ.ʃəs/

Ferocious

feroz, salvaje, cruel
Meaning
savagely fierce, cruel, or violent; extremely aggressive
Example
The ferocious storm destroyed many houses in the coastal area.
La feroz tormenta destruyó muchas casas en la zona costera.
B2 noun/verb /ˈfɒs.tər.ɪŋ/

fostering

fomentar
Meaning
The process of encouraging or promoting the development or growth of something; nurturing and caring for.
Example
Good teachers play a key role in fostering creativity in students.
Los buenos maestros desempeñan un papel clave en fomentar la creatividad en los estudiantes.
B1 noun /ˈfeɪvər/

favor

favor
Meaning
An act of kindness or approval.
Example
She asked him for a small favor.
Ella le pidió un pequeño favor.
B2 adjective /ˈfɛmənɪn/

feminine

femenino
Meaning
having qualities traditionally associated with women; feminine in nature
Example
She has a very feminine style of dressing.
Ella tiene un estilo muy femenino de vestir.
C2 noun /ˌfjuːzɪˈleɪd/

fusillade

fuselaje
Meaning
A series of shots fired or missiles thrown all at the same time or in quick succession.
Example
The soldiers advanced under a fusillade of bullets.
Los soldados avanzaron bajo una fusilada de balas.
B2 noun /fiːst/

Feast

banquete; festín
Meaning
a large meal, typically one in celebration of something; an annual religious celebration
Example
The wedding feast included traditional dishes from both families' cultures.
El banquete de la boda incluyó platos tradicionales de las culturas de ambas familias.
C1 noun /ˈfɔːr.tɪ.tjuːd/

fortitude

fortaleza
Meaning
Courage in pain or adversity; mental and emotional strength in facing difficulty.
Example
She faced adversity with great fortitude.
Ella enfrentó las adversidades con gran fortaleza.
A1 adjective /frɛntʃ/

french

francés
Meaning
Relating to France, its people, or their language.
Example
We enjoyed delicious French cuisine on our trip to Paris.
Disfrutamos de deliciosa comida francesa en nuestro viaje a París.
C2 adjective /ˈfɔːnɪŋ/

fawning

adulador excesivo
Meaning
displaying exaggerated flattery or affection
Example
Her fawning compliments made everyone uncomfortable.
Sus adulaciones excesivas hicieron que todos se sintieran incómodos.
B1 adjective /ˈfrʌstreɪtɪd/

frustrated

frustrado
Meaning
feeling annoyed or upset because of inability to achieve something
Example
She felt frustrated after failing the exam.
Ella se sintió frustrada después de reprobar el examen.
C1 noun ˌfɔːtɪfɪˈkeɪʃn

fortification

fortificación
Meaning
A defensive wall or other reinforcement built to strengthen a place against attack.
Example
The fortifications protected the city.
Las fortificaciones protegieron la ciudad.
C1 verb /ˈfɜːrmɛnt/

ferment

someterse a un proceso químico donde los azúcares se convierten en alcohol o ácido; incitar o agitar el cambio
Meaning
to undergo a chemical process where sugars are converted to alcohol or acid; to incite or stir up change
Example
The grapes are left to ferment for several weeks.
Las uvas se dejan fermentar durante varias semanas.
A1 noun /frɛnd/

friend

amigo
Meaning
a person with whom one has a bond of mutual affection
Example
He is my best friend.
Él es mi mejor amigo.
A1 adjective/noun /fɔːrθ/

fourth

cuarto
Meaning
Constituting number four in a sequence; coming after the third in position.
Example
He finished in fourth place in the race.
Terminó en el cuarto lugar en la carrera.
B2 noun ˈfeɪs tə ˈfeɪs ˈbætl

face-to-face battle

batalla cara a cara
Meaning
A direct confrontation or fight between opposing forces.
Example
The warriors fought a face-to-face battle with the enemies.
Los guerreros lucharon una batalla cara a cara con los enemigos.
C1 adjective/noun /fəˈrɛns.ɪk/

forensic

Análisis científico aplicado a asuntos criminales o legales
Meaning
Scientific analysis applied to criminal or legal matters
Example
Forensic experts analyze cybercrimes using advanced tools.
Los expertos forenses analizan los delitos cibernéticos utilizando herramientas avanzadas.
B2 noun /ˈfɛmənɪst/

feminist

feminista
Meaning
a person who supports equal rights and opportunities for women and men
Example
She proudly calls herself a feminist and fights for gender equality.
Ella orgullosamente se llama a sí misma feminista y lucha por la igualdad de género.
C1 noun /frɪˈvɒləti/

frivolity

frivolidad
Meaning
Lack of seriousness; silly or trivial behavior.
Example
The teacher discouraged frivolity during the exam.
El profesor desalentó la frivolidad durante el examen.
C2 verb /ˈflʌməks/

flummox

confundir
Meaning
To confuse or bewilder someone completely.
Example
The complicated puzzle flummoxed the students.
El complicado rompecabezas confundió a los estudiantes.
C2 adjective /ˈfraʊzi/

frowzy

desaliñado
Meaning
Unkempt, messy, or having a musty, unpleasant smell.
Example
He entered the room with a frowzy appearance after sleeping on the couch.
Entró en la habitación con una apariencia desaliñada después de dormir en el sofá.
C2 noun /ˈfʌstɪən/

fustian

discurso pomposo
Meaning
pompous or pretentious speech or writing; originally a type of thick cloth
Example
The politician's speech was filled with fustian and empty promises.
El discurso del político estaba lleno de fustián y promesas vacías.
B2 noun /ˈfleɪvər/

flavor

sabor
Meaning
The distinctive taste of a food or drink.
Example
This ice cream has a delicious mango flavor.
Este helado tiene un delicioso sabor a mango.
A2 adjective /ˈflaɪɪŋ/

flying

volando
Meaning
able to move through the air; related to flight or aircraft
Example
The flying bird disappeared into the clouds.
El pájaro volando desapareció entre las nubes.
A2 adverb /fɔːrˈɛvər/

forever

para siempre
Meaning
For all future time; for always.
Example
She promised to love him forever.
Ella prometió amarlo para siempre.
A2 noun /frɪdʒ/

fridge

nevera
Meaning
a household appliance used to keep food and drinks cold to preserve freshness
Example
I put the milk back in the fridge after breakfast.
Puse la leche en la nevera después del desayuno.
B2 noun /ˈfɒsɪl/

fossil

fósil
Meaning
the remains or impression of a prehistoric plant or animal embedded in rock
Example
The fossil of a dinosaur was discovered in the mountains.
El fósil de un dinosaurio fue descubierto en las montañas.
B2 adjective /ˈfeɪvərəbl/

favourable

favorable
Meaning
Expressing approval, support, or positivity; advantageous or beneficial
Example
The weather conditions were favourable for the outdoor event.
Las condiciones climáticas fueron favorables para el evento al aire libre.
C2 noun /ˈfʊl.krəm/

fulcrum

punto de apoyo
Meaning
The point or support on which a lever pivots; a central or essential point of activity or support.
Example
The teacher became the fulcrum of change in the school.
La maestra se convirtió en el fúlcrum del cambio en la escuela.
C1 verb/noun ˈfæð.əm

fathom

entender
Meaning
To understand after much thought; to measure the depth of water; to comprehend.
Example
It is difficult to fathom the depths of the ocean.
Es difícil entender las profundidades del océano.
B2 noun ˌfʌŋk.ʃəˈnæl.ə.ti

functionality

funcionalidad
Meaning
The quality of being functional; the ability to work or operate as intended.
Example
The new refrigerator has improved functionality.
El nuevo refrigerador ha mejorado la funcionalidad.
C2 verb /ˌfɔːrɔːrˈdeɪn/

foreordain

predestinar
Meaning
to determine or decree something in advance; to predestine
Example
Some believe that our lives are foreordained by fate.
Algunos creen que nuestras vidas están predestinadas por el destino.
A2 verb /fiːd/

feed

alimentar
Meaning
to give food to a person or animal
Example
She feeds the birds every morning.
Ella alimenta a los pájaros todas las mañanas.
C1 adjective /frɔːt/

fraught

lleno
Meaning
Filled with or likely to result in something undesirable.
Example
The negotiations were fraught with tension and uncertainty.
Las negociaciones estuvieron llenas de tensión e incertidumbre.
B2 noun /fɜːr/

Fur

pelaje
Meaning
thick hair covering the body of animals
Example
The cat's fur was soft and warm to touch.
El pelaje del gato era suave y cálido al tacto.
C2 verb /fɪˈneɪɡəl/

finagle

obtener algo con astucia o engaño
Meaning
to obtain something by cleverness or trickery
Example
He finagled a free ticket by pretending to be a VIP guest.
Él consiguió un boleto gratis pretendiendo ser un invitado VIP.
C2 noun /feɪnt/

feint

finta, movimiento engañoso
Meaning
a deceptive or pretended movement, especially in fighting or sports
Example
The boxer made a feint to the left before striking to the right.
El boxeador hizo una finta hacia la izquierda antes de golpear hacia la derecha.
B1 verb /ˈfraɪtən/

frighten

asustar
Meaning
to cause fear or alarm in someone
Example
The loud noise frightened the child.
El ruido fuerte asustó al niño.
A2 verb /fraɪ/

fry

freír
Meaning
to cook food in hot oil or fat
Example
She fries eggs for breakfast every morning.
Ella fríe huevos para el desayuno todas las mañanas.
C2 noun /ˈfɔːθ.raɪt.nəs/

forthrightness

franqueza
Meaning
The quality of being honest and straightforward; directness.
Example
Her forthrightness made her a respected journalist.
Su forthrightness la convirtió en una periodista respetada.
C1 noun /ˈfænsiər/

fancier

aficionado
Meaning
a person who has a special interest in a particular thing or activity, especially animals or hobbies
Example
He is a fancier of rare birds.
Él es un aficionado a las aves raras.
C1 noun /fɪˈnɛs/

finesse

sutilidad, destreza, refinamiento
Meaning
Subtlety and skill; refinement and delicacy in performance or artistry.
Example
The artist painted with great finesse.
El artista pintó con gran destreza.
C2 noun /ˈfɔːrʃɔːr/

foreshore

orilla
Meaning
The part of the shore between the high and low tide marks
Example
Children were playing on the foreshore, collecting shells.
Los niños estaban jugando en la orilla, recogiendo conchas.
C1 adjective /freɪl/

frail

débil
Meaning
Physically weak and delicate.
Example
The old man was too frail to walk without help.
El anciano estaba demasiado débil para caminar sin ayuda.
C1 noun flɛər

flair

habilidad natural
Meaning
A natural ability to do something well.
Example
She has a flair for design, always creating visually stunning work.
Ella tiene una habilidad especial para el diseño, siempre creando trabajos visualmente impresionantes.
C1 noun /ˈfɔɪeɪr/

foyer

vestíbulo
Meaning
An entrance hall or lobby in a building.
Example
The guests waited in the hotel foyer before checking in.
Los huéspedes esperaron en el vestíbulo del hotel antes de registrarse.
C1 noun /ˈfɔːr.teɪ/ or /fɔːrt/

forte

fortaleza
Meaning
a strong ability or talent; something one does particularly well
Example
Cooking is definitely her forte.
Cocinar es definitivamente su fortaleza.
C1 adjective /ˈfiːbl/

feeble

débil, flojo
Meaning
lacking physical strength or vigor; weak
Example
After the illness, she felt too feeble to stand.
Después de la enfermedad, se sintió demasiado débil para levantarse.
C1 adjective /flæmˈbɔɪənt/

flamboyant

llamativo, colorido o confiado
Meaning
showy, strikingly bold or colorful; confident and lively
Example
His flamboyant style drew everyone's attention at the party.
Su estilo llamativo atrajo la atención de todos en la fiesta.
B1 adjective /ˈfluː.ənt/

Fluent

fluido; elocuente
Meaning
able to speak a language easily and accurately; flowing smoothly and gracefully
Example
She is fluent in three languages including English and French.
Ella es fluida en tres idiomas, incluidos el inglés y el francés.
B2 adjective /ˈflɔːrəl/

floral

floral
Meaning
Relating to flowers or decorated with flowers.
Example
She wore a beautiful floral dress to the party.
Ella llevó un hermoso vestido floral a la fiesta.
A2 adjective /fɪfθ/

fifth

quinto
Meaning
constituting number five in a sequence
Example
She lives on the fifth floor of the building.
Ella vive en el quinto piso del edificio.
C1 noun /ˈfjuː.tʃə.rɪst/

futurist

futurista
Meaning
A person who studies or predicts the future, especially trends in science, technology, or society.
Example
The futurist predicted major changes in transportation within the next decade.
El futurista predijo grandes cambios en el transporte dentro de la próxima década.
C1 adjective /ˈfjuː.dəl/

feudal

feudal
Meaning
relating to the system of feudalism, a medieval social system based on land ownership and obligations
Example
The castle is a remnant of the feudal era.
El castillo es un vestigio de la era feudal.
B1 noun /fɒɡ/

Fog

niebla
Meaning
a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface that reduces visibility
Example
Dense fog covered the highway this morning.
La densa niebla cubrió la carretera esta mañana.
C2 noun /floʊ/

floe

iceberg flotante
Meaning
a large sheet of floating ice
Example
The polar bears rested on the ice floe.
Los osos polares descansaron sobre el iceberg flotante.
C1 noun /frɪndʒ/

fringe

borde decorativo / orilla
Meaning
A decorative border of threads; the outer edge or margin of something.
Example
The festival had a fringe of small independent performances.
El festival tenía un borde de pequeñas actuaciones independientes.
C1 adjective ˈfæʃ.ɪst

fascist

fascista
Meaning
Relating to or characteristic of fascism; extremely authoritarian.
Example
Fascist governance undermines freedom.
El gobierno fascista socava la libertad.
A2 adjective /ˈfɔːrməl/

formal

formal
Meaning
done in accordance with rules of convention or etiquette; official or serious in nature
Example
He wore a formal suit to the wedding.
Él usó un traje formal para la boda.
A1 preposition /frəm/ or /frʌm/

from

de
Meaning
Used to indicate the starting point of a journey, action, or source.
Example
She came from Dhaka to visit her family.
Ella vino de Dhaka para visitar a su familia.
B2 noun ˈflaɪ.ɪŋ kɑːrz

flying cars

autos voladores
Meaning
Vehicles that can travel both on roads and in the air.
Example
Flying cars could soon solve urban traffic congestion.
Los autos voladores pronto podrían resolver el problema del tráfico urbano.
B2 noun /faɪˈnæn.ʃəl rɪˌspɒn.sɪˈbɪl.ə.ti/

financial responsibility

responsabilidad financiera
Meaning
The practice of managing money and other financial resources in a responsible and effective manner.
Example
Financial responsibility ensures long-term economic stability.
La responsabilidad financiera asegura la estabilidad económica a largo plazo.
B1 noun /ˈfaɪəˌfaɪtə/

firefighter

bombero
Meaning
a person whose job is to put out fires
Example
The firefighter saved the family from the burning building.
El bombero salvó a la familia del edificio en llamas.
C1 verb /fret/

fret

preocuparse
Meaning
to worry or be anxious; to be troubled
Example
Don't fret about the exam results.
No te preocupes por los resultados del examen.
A1 preposition /fɔːr/

for

para
Meaning
used to indicate purpose, destination, or recipient
Example
This gift is for you.
Este regalo es para ti.
C1 adjective /ˌfɑːrˈfetʃt/

farfetched

improbable o poco probable
Meaning
unlikely to happen or be true; improbable
Example
His explanation for being late sounded farfetched.
Su explicación para llegar tarde sonaba inverosímil.
C2 noun /ˈfoʊksl/

forecastle

castillo de proa
Meaning
The forward part of a ship below the deck, traditionally used as living quarters for the crew.
Example
The sailors gathered in the forecastle after their shift.
Los marineros se reunieron en el castillo de proa después de su turno.
C1 adjective /ˈfaɪə.ri/

Fiery

ardiente; apasionado; temperamental
Meaning
burning; passionate; hot-tempered; showing strong emotion
Example
She has a fiery temper that flares up quickly.
Ella tiene un temperamento ardiente que se enciende rápidamente.
C2 noun /ˈfɪlɪɡri/

filigree

trabajo ornamental delicado, generalmente de oro o plata
Meaning
delicate ornamental work of fine wire, usually of gold or silver
Example
The necklace was decorated with intricate gold filigree.
El collar estaba decorado con intrincados filigríes de oro.
C1 noun /ˈfʌŋɡəs/

fungus

hongo
Meaning
a spore-producing organism feeding on organic matter, including molds, yeast, and mushrooms
Example
A strange fungus was growing on the old tree.
Un extraño hongo estaba creciendo en el viejo árbol.
B2 verb fəˈsɪl.ɪ.teɪt

facilitate

facilitar
Meaning
Make an action or process easier or more achievable; to help bring about.
Example
Good infrastructure facilitates economic growth.
La buena infraestructura facilita el crecimiento económico.
C2 adjective /ˈfɪnɪki/

finicky

difícil de complacer; muy particular en los detalles
Meaning
difficult to please; very particular about details
Example
He is so finicky about his food that he only eats organic vegetables.
Él es tan quisquilloso con su comida que solo come verduras orgánicas.
B2 noun /ˈfæbrɪk/

fabric

tejido
Meaning
Cloth or material produced by weaving or knitting fibers.
Example
The tailor used silk fabric to make the dress.
El sastre usó tela de seda para hacer el vestido.
C2 verb /fɔːrˈboʊd/

forebode

presagiar
Meaning
To predict or have a strong inner feeling of a future misfortune or evil.
Example
Dark clouds forebode a coming storm.
Las nubes oscuras presagian una tormenta venidera.
B2 verb /fɔːrˈsiː/

foresee

prever
Meaning
To be aware of beforehand; to predict or expect.
Example
She could foresee the challenges ahead.
Ella podía prever los desafíos por delante.
C2 adjective /ˈfʌndʒəbl/

fungible

fungible
Meaning
interchangeable; able to replace or be replaced by another identical item
Example
In finance, money is considered a fungible asset.
En finanzas, el dinero se considera un activo fungible.
C1 noun /fəˌsɪlɪˈteɪʃən/

facilitation

facilitación
Meaning
The action of facilitating or making an action or process easier or helping bring about an outcome.
Example
Her facilitation made the meeting run smoothly.
Su facilitación hizo que la reunión fuera fluida.
C2 noun /ˈflɛkʃən/

flection

flexión
Meaning
The act of bending or the state of being bent, especially of a limb or joint.
Example
The doctor tested the patient's knee flection during the examination.
El doctor probó la flexión de la rodilla del paciente durante el examen.
C2 noun /foʊ ˈpɑː/

faux pas

desliz social
Meaning
a social blunder or mistake in etiquette
Example
He committed a major faux pas by forgetting her birthday.
Cometió un gran desliz social al olvidar su cumpleaños.
B2 noun /frɒk/

Frock

falda
Meaning
a dress, especially a simple or casual one for women or children
Example
The little girl wore a pink frock to her birthday party.
La niña pequeña llevaba una falda rosa a su fiesta de cumpleaños.
C2 adjective /ˈfækʃəs/

factious

faccionado
Meaning
causing disagreement or division within a group; inclined to form factions
Example
The debate became factious, splitting the committee into rival camps.
El debate se volvió faccioso, dividiendo al comité en campos rivales.
A2 adjective /frɛʃ/

fresh

fresco
Meaning
new, recently made, or clean and pure
Example
The bread is still fresh from the oven.
El pan sigue fresco del horno.
C1 adjective /ˈfliː.tɪŋ/

fleeting

efímero
Meaning
Lasting for a very short time; passing quickly.
Example
Happiness can be fleeting, so cherish every moment.
La felicidad puede ser efímera, así que aprecia cada momento.
B2 noun /ˈfjuːʒən/

fusion

fusión
Meaning
the process or result of joining two or more things together to form a single entity
Example
The restaurant offers a unique fusion of Asian and European cuisines.
El restaurante ofrece una fusión única de cocinas asiática y europea.
B2 adjective /fræŋk/

Frank

honesto; abierto; directo; sincero
Meaning
honest; open; straightforward; candid
Example
She gave me a frank opinion about my presentation.
ella me dio una opinión franca sobre mi presentación.
A2 noun /ˈfɔːrənər/ or /ˈfɑːrənər/

foreigner

extranjero
Meaning
A person from another country.
Example
The city welcomes every foreigner with kindness.
La ciudad recibe a cada extranjero con amabilidad.
B2 adjective /fɔːrˈsiːəbl/

foreseeable

previsible
Meaning
Able to be predicted or expected in advance
Example
The company is unlikely to make changes in the foreseeable future.
Es poco probable que la empresa realice cambios en el futuro previsible.
C2 adjective /ˈfæð.əm.ləs/

fathomless

incomprensible o insondable
Meaning
impossible to understand or measure; very deep
Example
The ocean seemed fathomless as it stretched to the horizon.
El océano parecía incomprensible cuando se extendía hasta el horizonte.
B2 noun fɪkst ˈɪnkʌm

fixed income

ingresos fijos
Meaning
Investment that provides a return in the form of fixed periodic payments.
Example
Fixed income investments provide reliable returns.
Las inversiones de ingreso fijo proporcionan rendimientos confiables.
C2 noun /ˈfɪɡmənt/

figment

invención, imaginación
Meaning
something invented or imaginary; a fabrication of the mind
Example
The story of the haunted house is just a figment of her imagination.
La historia de la casa embrujada es solo un producto de su imaginación.
C2 noun /ˈfɔːrˌnɑːlɪdʒ/

foreknowledge

preconocimiento
Meaning
Awareness of something before it happens or exists.
Example
The prophet claimed to have foreknowledge of the event.
El profeta afirmó tener preconocimiento del evento.
A2 noun/verb /fɛns/

fence

cerca
Meaning
a barrier, usually made of wood or wire, that surrounds an area; to enclose with a barrier
Example
They built a fence around the garden.
Ellos construyeron una cerca alrededor del jardín.
B2 noun /ˈfluː.ən.si/

fluency

fluidez
Meaning
The ability to speak or write a language smoothly and effortlessly.
Example
She speaks English with remarkable fluency.
Ella habla inglés con fluidez notable.
C2 noun /ˈfiːəlti/

fealty

fidelidad y lealtad
Meaning
loyalty or allegiance, especially to a sovereign or lord
Example
The knight swore fealty to his king.
El caballero juró fidelidad a su rey.
C2 noun /fiːf/

fief

un terreno de tierra otorgado bajo el sistema feudal; un dominio o área de control
Meaning
an estate of land held under the feudal system; a domain or area of control
Example
The knight was granted a fief by the lord for his service.
El caballero recibió un feudo del señor por su servicio.
A2 verb /friːz/

freeze

congelar
Meaning
to become solid due to cold; to preserve by cold
Example
Water freezes at zero degrees Celsius.
El agua se congela a cero grados Celsius.
B2 noun /ˈfɔːr.hed/

Forehead

frente
Meaning
the part of the face above the eyebrows and below the hairline
Example
He wiped the sweat from his forehead.
Él se secó el sudor de la frente.
B1 noun /feɪθ/

Faith

fe; confianza; creencia religiosa;
Meaning
complete trust or confidence in someone or something; strong belief in religion
Example
She had unwavering faith in her team's ability to succeed.
Ella tenía una fe inquebrantable en la habilidad de su equipo para tener éxito.
B1 adjective /fɜːrm/

Firm

firme; sólido; resistente; que no cede a la presión
Meaning
solid; stable; strong; not yielding to pressure
Example
She has a firm grip on the rope.
Ella tiene un firme agarre de la cuerda.
C1 noun /ˈfoʊ.kəs ˈtræk.ɪŋ/

focus tracking

seguimiento del enfoque
Meaning
A technique of monitoring and maintaining attention on specific tasks or goals.
Example
Proper focus tracking improves productivity.
Un seguimiento adecuado del enfoque mejora la productividad.
B2 noun ˈfjuː.tʃɚ ˌdʒen.əˈreɪ.ʃənz

future generations

futuras generaciones
Meaning
People who have not yet been born, considered in terms of the environment or society they will inherit.
Example
Sustainable development ensures a better life for future generations.
El desarrollo sostenible asegura una mejor vida para las futuras generaciones.
C2 adjective /ˈfæsaɪl/

Facile

fácil; superficial; carente de profundidad
Meaning
easily achieved; superficial; lacking depth
Example
His facile explanation didn't address the real problem.
Su explicación fácil no abordó el problema real.
B1 verb /floʊt/

float

flotar
Meaning
to rest or move on the surface of a liquid or in the air without sinking
Example
The boat began to float gently down the river.
El bote comenzó a flotar suavemente por el río.
B1 noun, verb /ˈfaɪ.næns/ or /fəˈnæns/

finance

finanzas
Meaning
the management of money and investments, or to provide funds for something
Example
The company secured finance from a major bank.
La compañía obtuvo financiamiento de un banco importante.
C2 adjective /ˈfrɪski/

Frisky

vivaz; energético; juguetón; travieso
Meaning
lively; energetic; playful; mischievous
Example
The frisky puppy ran around the garden playfully.
El cachorro juguetón corrió alrededor del jardín de manera juguetona.
C2 noun /ˌfɔːrɔːrdɪˈneɪʃən/

foreordination

preordenación
Meaning
the act of determining something in advance; predestination
Example
The doctrine of foreordination suggests that events are fixed by divine will.
La doctrina de la preordenación sugiere que los eventos están fijados por la voluntad divina.
C1 verb /ˈfɔːrfɪt/

forfeit

perder, renunciar como penalización
Meaning
to lose or give up something, usually as a penalty for wrongdoing
Example
He had to forfeit the match after breaking the rules.
Tuvo que perder el partido después de romper las reglas.